However, after ordering Ozai to kill Zuko due to the former's attempt to usurp Iroh's birthright, Azulon himself was murdered after his daughter-in-law, Princess Ursa, made a deal with Ozai and provided the latter with a poisonous substance, which was used to end Azulon's life.

Did Zuko's mother kill Azulon?

Why Zuko's Mother Was Banished

Azulon's actions would prove to be his undoing. ... Upon discovering this plot, Ursa made a deal with Ozai: she would use her herbal skills to concoct a colorless and odorless poison so that Azulon could be killed and Ozai could take his place as Fire Lord.

Did Ozai actually love Ursa?

Ozai was arranged to be married to Ursa on the wish of Azulon, in order to fulfill a prophecy that a union between them would result in a strong and powerful bloodline. However, in order for Ursa to marry the Fire Nation prince, she had to break up with Ikem, a relationship she never got over.